v5.0.0-rc.1

   🚨 Breaking Changes

• Inline projects extend the root config by default  -  by @sheremet-va in #10750 (fec00)
• Enable mocking Temporal without fake timers  -  by @fabon-f, Hiroshi Ogawa and OpenCode in #10757 (ac2d4)
• Support nested projects  -  by @sheremet-va in #10846 (ec367)
• Use > as separator in -t, calculate only once  -  by @sheremet-va in #10686 (a0b20)
• Fail the test when an asynchronous assertion is not awaited  -  by @sheremet-va in #10868 (86d4a)
• Share the Vite server between inline projects  -  by @sheremet-va in #10848 (d87c9)
• browser: Save failure screenshots in attachmentsDir  -  by @macarie in #10917 (3b5bb)
• spy: Preserve class mock prototype methods on instances  -  by @sheremet-va in #10910 (6093d)
• types: Add better promise support in expects and matchers  -  by @samchungy and @sheremet-va in #8266 (41f55)

   🚀 Features

• Report the duration breakdown as percentages  -  by @sheremet-va and @AriPerkkio in #10820 (c67d2)
• cli: Support -p shorthand for --project  -  by @sheremet-va in #10826 (1addd)
• vm: Support require(esm) in vm pools  -  by @sheremet-va in #10829 (01298)

   🐞 Bug Fixes

• Coalesce concurrent watch-mode restarts, deflake the pool stderr fixture  -  by @sheremet-va in #10822 (a31f8)
• Prevent vitest --typecheck from reporting a false success when the tsc process crashes  -  by @hitenkalda and Hiten Kalda in #10705 (a1b05)
• Collect in-source tests when the module is cached  -  by @koutaro-masaki in #10577 and #10589 (a7bf2)
• Swap replace() arguments so timeout error stack shows the real message  -  by @lazerg in #10875 (aba0f)
• Stale mock metadata breaks automocking with isolate:false  -  by @kade-robertson in #10145 and #10541 (8e210)
• Don't lose worker output on teardown, deflake timing-sensitive tests  -  by @sheremet-va in #10842 (1216b)
• browser:
  • Ignore channel events in a tester opened as a top-level window  -  by @simshanith in #9379 and #9381 (46a3c)
  • Resolve connectTimeout from the project config  -  by @lazerg in #10879 and #10880 (62c79)
  • Prebundle vite module runner with vitest  -  by @lebovvskii and @sheremet-va in #10836 and #10856 (37c24)
  • Restore dependency reload warning  -  by @hi-ogawa, Hiroshi Ogawa and OpenCode in #10913 (90d69)
  • Configure internal optimizer dependencies  -  by @hi-ogawa, Hiroshi Ogawa and OpenCode in #10915 (a72f4)
• cache:
  • Improve fsModuleCache resiliency during external modifications  -  by @jszumski in #10869 (5eb35)
• cli:
  • Exit on CTRL+c even when globalSetup runs blocked code  -  by @AriPerkkio in #10863 (d568f)
• deps:
  • Update all non-major dependencies  -  by @sheremet-va in #9958 (7faa7)
  • Update all non-major dependencies  -  by @sheremet-va in #10861 (0188c)
  • Update all non-major dependencies  -  by @sheremet-va in #10898 (61c4b)
• expect:
  • Handle nullish toHaveProperty values  -  by @liyimil in #10735 and #10811 (99e59)
• reporters:
  • Print parent describe suites when the passed-test list is hidden  -  by @ChihebBENCHEIKH1, Chiheb Bencheikh and @sheremet-va in #10606 and #10768 (658af)
• runner:
  • Don't fail collection when accessing error.stack throws  -  by @sheremet-va in #10839 (202e2)
• spy:
  • Point ESM namespace spy error to module mocking docs  -  by @ryandiginomad and Ryan Tang in #10707 (d6cec)
• typecheck:
  • Report a checker crash on Windows instead of a spawn failure  -  by @sheremet-va in #10907 (77aac)
• vitest:
  • Remove broken "./src/*" export from package.json  -  by @sheremet-va in #10918 (2e5df)
• vm:
  • Stop retaining every finished test file in vm pool workers  -  by @sheremet-va in #10854 (38503)

   🏎 Performance

• Lowers peak memory usage when using --changed on a large graph  -  by @jszumski in #10866 (9f23f)
• browser: Serve framework assets as immutable  -  by @sheremet-va in #10729 (7af87)

    View changes on GitHub

v5.0.0-beta.7

   🚨 Breaking Changes

• Separate config resolution from the server creation  -  by @sheremet-va in #10554 (1c0ec)

   🚀 Features

• Add toggable injectCjsGlobals option  -  by @sheremet-va in #10709 (82671)
• Promote fsModuleCache to a top-level option  -  by @sheremet-va in #10734 (78ed7)
• Support non-ascii characters in for/each title placeholders  -  by @k-yle in #10773 (15e0a)
• benchmark: Add pluggable benchmark provider API  -  by @GuillaumeLagrange and @sheremet-va in #10799 (86c70)

   🐞 Bug Fixes

• Disable server HMR before plugins read it in their config hook  -  by @sheremet-va in #10731 (e060b)
• Close the pool before the Vite servers  -  by @sheremet-va in #10725 (96fa6)
• Remove listeners in the typecheck worker's off  -  by @sheremet-va in #10741 (d758b)
• Keep per-file isolation in vm pools when maxWorkers is 1  -  by @sheremet-va in #10743 (83ab9)
• Node.js 20 deprecation warning for ci.yml  -  by @hirehamir in #10759 (2127f)
• Prevent node builtins double prefix  -  by @malobre in #10630 and #10767 (22d35)
• Set non-zero exit code when teardown throws during close  -  by @zakcutner and @AriPerkkio in #10794 (22116)
• Don't race the typechecker spawn grace period on windows  -  by @xevrion in #10814 (b19e5)
• browser:
  • Preserve pre-transform request defaults  -  by @sheremet-va in #10748 (b6060)
  • Fix error stacktrace location off-by-one  -  by @hi-ogawa, Hiroshi Ogawa and OpenCode in #10724 (62b8d)
  • Inlined awaited import should not trigger syntax error after transform  -  by @smeng9, Shaoyu Meng and Claude Opus 4.8 (1M context) in #10784 (51acd)
  • Mock window.print to avoid hanging  -  by @aaravjaichand in #7375 and #10798 (66d95)
• pool:
  • Vm pools to respect cgroupsv2 memory limit  -  by @milas in #10721 (3923c)

   🏎 Performance

• Serve warm modules to workers in one round-trip, enable the node compile cache  -  by @sheremet-va in #10708 (b144a)
• Make the Node compile cache opt-in, persist worker caches on teardown  -  by @sheremet-va in #10742 (941bc)
• Reuse compiled code across vm pool contexts and prewarm the module graph  -  by @sheremet-va in #10744 (d8b04)
• Bundle vitest's own dependencies  -  by @sheremet-va in #10685 (c0508)
• browser:
  • Open browser sessions adaptively instead of maxWorkers upfront  -  by @sheremet-va in #10726 (6db8d)
  • Cut per-file round trips  -  by @sheremet-va in #10730 (3feef)
  • Stop serving framework sourcemaps in headless runs  -  by @sheremet-va in #10728 (6aefb)
  • Prewarm the browser while the Vite server starts  -  by @sheremet-va in #10727 (c1767)
  • Pre-bundle the vitest runtime in optimizeDeps  -  by @sheremet-va in #10713 (de631)
• coverage:
  • Speed up v8 report generation (bounded-memory merge + precompiled globs)  -  by @toxik, Claude Opus 4.8 (1M context) and @AriPerkkio in #10506 (b05e5)
  • Reduce RPC data and unnecessary serializations  -  by @AriPerkkio in #10781 (7e7e3)

    View changes on GitHub

v5.0.0-beta.6

   🚨 Breaking Changes

• Add screenshotDirectory config to browser.expect.toMatchScreenshot  -  by @macarie in #10592 (a60de)
• Update @sinonjs/fake-timers and support mocking Temporal  -  by @hi-ogawa, Hiroshi Ogawa and OpenCode (claude-opus-4-8) in #10654 (f8b15)
• Remove webdriverio package  -  by @sheremet-va in #10675 (5fed6)
• Clear mocks by default before each test  -  by @sheremet-va in #10613 (0f646)
• Don't emit localStorage warnings on Node 26, fail gracefully when worker fails to start  -  by @sheremet-va in #10293 (334ed)
• reporters:
  • Write json and junit reporter output files to .vitest by default  -  by @hi-ogawa, Hiroshi Ogawa, OpenCode (claude-opus-4-8) and @AriPerkkio in #10621 (58577)
• ui:
  • Harden UI API access  -  by @hi-ogawa, Hiroshi Ogawa and Codex in #10583 (4c26d)
  • Change html reporter default output to .vitest  -  by @hi-ogawa and Hiroshi Ogawa in #10620 (29c36)

   🚀 Features

• vitest: Create vi.when()  -  by @macarie in #10174 (3900e)

   🐞 Bug Fixes

• Fix setImmediate await in detect-async-leak  -  by @hi-ogawa and Hiroshi Ogawa in #10608 (dd62b)
• Fix per-project sequence config  -  by @hi-ogawa, Hiroshi Ogawa and OpenCode (claude-opus-4-8) in #10659 (40cdc)
• Add handshake timeout to iframe communication  -  by @sheremet-va in #10656 (3545f)
• Don't print column in test names when includeTaskLocation is enabled  -  by @sheremet-va in #10681 (bd9cc)
• browser:
  • Always derive a positive locator action timeout  -  by @sheremet-va in #10626 (5b864)
  • Resize the browser ui only if it's not headless  -  by @sheremet-va in #10662 (b5c61)
  • Check fs access in builtin commands  -  by @hi-ogawa, Hiroshi Ogawa and OpenCode (claude-opus-4-8) in #10674 (33f96)
• coverage:
  • Non-awaited module imports cause wrong offsets  -  by @AriPerkkio in #10643 (c4090)
  • Fail fast when coverage.reportsDirectory conflicts between concurrent runs  -  by @jgamaraalv and @AriPerkkio in #10466 (833f0)
• pool:
  • Improve error message when worker exits unexpectedly  -  by @filmaj and @AriPerkkio in #10587 (76139)
• types:
  • Allow changed in configuration options  -  by @AriPerkkio in #10651 (0da12)
• vm:
  • Fix external module resolve error with deps optimizer query for encoded URI  -  by @SveLil in #10658 (90c4e)

    View changes on GitHub

v4.1.10

   🐞 Bug Fixes

• browser: Check fs access in builtin commands [backport to v4]  -  by @hi-ogawa, Hiroshi Ogawa and OpenCode (claude-opus-4-8) in #10680 (5c18d)
• vm: Fix external module resolve error with deps optimizer query for encoded URI [backport to v4]  -  by @SveLil and @hi-ogawa in #10661 (bae52)

    View changes on GitHub

v3.2.7

   🐞 Bug Fixes

• browser: Check fs access in builtin commands [backport to v3]  -  by @hi-ogawa, Hiroshi Ogawa and OpenCode (claude-opus-4-8) in #10679 (b795e)

    View changes on GitHub

v5.0.0-beta.5

   🚨 Breaking Changes

• Don't lookup config file from ancestor directories  -  by @hi-ogawa, Codex and Hiroshi Ogawa in #10428 (945d9)
• Inline @vitest/runner package, do not publish it anymore  -  by @sheremet-va in #10511 (6d6e4)
• Allow mutating happy-dom/jsdom window object  -  by @hi-ogawa, Hiroshi Ogawa and Codex in #10373 (206e8)
• Expose concurrencyId/workerId on TestModule's diagnostics, make id 1-based  -  by @sheremet-va in #10516 (bdd98)
• browser: Require sessionId for orchestrator html request  -  by @hi-ogawa, Hiroshi Ogawa and Codex in #10522 (79b7d)
• coverage: Allow thresholds.perFile to accept an object  -  by @vladlenskiy and @AriPerkkio in #10190 (13b78)

   🚀 Features

• browser: Display nested mark trace in UI  -  by @hi-ogawa, Hiroshi Ogawa and Codex in #10437 (86ffc)
• cli: Add --repeats CLI option  -  by @todor-a in #10504 (ee48b)
• coverage: thresholds.autoUpdate to receive previous threshold as argument  -  by @wouterkroes in #10495 (04f81)

   🐞 Bug Fixes

• Fix mixed stdout/stderr log timestamps in onUserConsoleLog  -  by @Copilot, Hiroshi Ogawa, @hi-ogawa and @sheremet-va in #10308 (62756)
• Fix importOriginal with optimizer and query import  -  by @davidhwilliams, David Harris, @hi-ogawa, Hiroshi Ogawa and Codex in #10469 (6a3bb)
• Correct transform time calculation in merged report  -  by @potatomatoooo and @hi-ogawa in #10570 and #10578 (b7897)
• browser:
  • Wait for orchestrator readiness before resolving browser sessions  -  by @soconnor-seeq in #10397 (fe5ed)
  • Wait for iframe tester readiness before preparing  -  by @soconnor-seeq in #10497 (f2655)
  • Encode iframeId in tester iframe URL  -  by @Pduhard, Pduhard and Claude Opus 4.8 (1M context) in #10520 and #10521 (c8bf1)
• coverage:
  • Avoid matching sibling project roots  -  by @innoprej, Shin JaeHee and @AriPerkkio in #10311 (e30dd)
• mocker:
  • Hoist vi.mock() for vite-plus/test imports  -  by @Brooooooklyn and Claude Opus 4.8 (1M context) in #10489 (88376)
• pool:
  • Prevent test run hang on worker crash  -  by @jaxalo and @AriPerkkio in #10543 (40878)
• vitest:
  • Strip non-serializable functions from inline diff config  -  by @DucMinhNe in #10573 (5b81a)

    View changes on GitHub

v4.1.9

🐞 Bug Fixes

• Fix importOriginal with optimizer and query import [backport to v4] - by Hiroshi Ogawa, David Harris, Codexand Vladimir in #10546 (a5180)
• browser:
  • Wait for orchestrator readiness before resolving browser sessions [backport to v4] - by Vladimir and Séamus O'Connor in #10555 (7fb29)
  • Wait for iframe tester readiness before preparing [backport to v4] - by Vladimir and Séamus O'Connor in #10497 and #10556 (fbc62)
• mocker:
  • Hoist vi.mock() for vite-plus/test imports [backport to v4] - by Hiroshi Ogawa, LongYinan, Claude Opus 4.8 and Vladimir in #10548 (2c955)
• pool:
  • Prevent test run hang on worker crash [backport to v4] - by Ari Perkkiö and Jattioui Ismail in #10543 and #10564 (934b0)

View changes on GitHub

v5.0.0-beta.4

   🚨 Breaking Changes

• Throw an error if hoistable methods are outside the top level scope  -  by @sheremet-va in #10460 (d0b4f)
• toHaveTextContent is strict, add toMatchTextContent as alternative  -  by @sheremet-va in #10473 (18f30)
• benchmark: Rewrite the public API  -  by @sheremet-va in #10113 (19f6e)
• browser: Enable locators.exact by default  -  by @sheremet-va in #10430 (e2032)

   🚀 Features

• browser: Show trace view steps in editor panel  -  by @hi-ogawa and Codex in #10404 (8c4b6)
• reporter: Support html reporter single file output  -  by @hi-ogawa, Codex and Claude Opus 4.7 (1M context) in #10235 (f757e)

   🐞 Bug Fixes

• Preserve vi.defineHelper callsite for async error stack  -  by @macayu17 and @hi-ogawa in #10415 (ac697)
• Respect disableConsoleIntercept in browser mode  -  by @Copilot, hi-ogawa, @hi-ogawa and Codex in #10391 (66110)
• ForceRerunTriggers uses directory globs against files  -  by @Patrick-Clausen and Patrick Clausen in #10421 and #10420 (4fee2)
• Unify typechecking and ast collection  -  by @sheremet-va in #10449 (af993)
• Don't print typecheck warning more than once  -  by @sheremet-va in #10461 (15275)
• Correct collumn when parsing tests  -  by @sheremet-va in #10467 (7c2fc)
• browser:
  • Fix stale source map on watch mode  -  by @hi-ogawa in #10389 (6d772)
  • Escape inline orchestrator scripts  -  by @hi-ogawa and Codex in #10412 (c22cf)
  • Disable client cdp API when allowWrite/allowExec: false  -  by @hi-ogawa and Codex in #10444 (63e3b)
• mocker:
  • Skip hoist transform without ast mock calls  -  by @hi-ogawa and Codex in #10410 (0468e)
• ui:
  • Fix module graph in browser mode with --ui  -  by @hi-ogawa in #10386 (3003c)
  • Render ANSI color codes in editor panel inline error widget  -  by @Copilot, hi-ogawa and @hi-ogawa in #10418 (766b8)
• webdriverio:
  • Allow gpu in headless chrome  -  by @rotempasharel1 in #10376 (f310a)

   🏎 Performance

• Improve performance in hot paths  -  by @sheremet-va in #10446 (03faf)

    View changes on GitHub

v4.1.8

   🐞 Bug Fixes

• browser:
  • Disable client cdp API when allowWrite/allowExec: false [backport to v4]  -  by @hi-ogawa and Codex in #10450 (e4067)
  • Remove orphaned Playwright route when same module is mocked via multiple ids [backport to v4]  -  by @toxik and @Zelys-DFKH in #10474 (675b4)

    View changes on GitHub

v3.2.6

   🐞 Bug Fixes

• Pin last supported vite-node version  -  by @sheremet-va (16f12)

    View changes on GitHub